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Can be slow<br />
o Even with a fast connection, web-based applications can sometimes be slower than<br />
accessing a similar software program on your desktop PC.<br />
o Everything about the program, from the interface to the current document, has to<br />
be sent back and forth from your computer to the computers in the cloud.<br />
o If the cloud servers happen to be backed up at that moment, or if the Internet is<br />
having a slow day, you would not get the instantaneous access you might expect<br />
from desktop applications.<br />
Stored data might not be secure<br />
o With cloud computing, all your data is stored on the cloud.<br />
• The questions is How secure is the cloud?<br />
o Can unauthorised users gain access to your confidential data?<br />
Stored data can be lost<br />
o Theoretically, data stored in the cloud is safe, replicated across multiple machines.<br />
o But on the off chance that your data goes missing, you have no physical or local<br />
backup.<br />
• Put simply, relying on the cloud puts you at risk if the cloud lets you down.<br />
THE FUTURE<br />
• Many of the activities loosely grouped together under cloud computing have already been<br />
happening and centralised computing activity is not a new phenomena<br />
• Grid Computing was the last research-led centralised approach<br />
• However there are concerns that the mainstream adoption of cloud computing could cause<br />
many problems for users<br />
• Many new open source systems appearing that you can install and run on your local cluster<br />
– It should be able to run a variety of applications on these systems
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